Is it possible to load a variable that can not be cleared

4 次查看（过去 30 天）
John
John 2019-7-12
回答： Walter Roberson 2019-7-13
I have a variable 'x' that is loaded using the startup file in ...\Documents\MATLAB\startup.m that executes the command
load x
I want this variable to remain in the workspace after executing
clear
in any of my MATLAB scripts or functions. Is this possible?
  1 个评论
Walter Roberson
Walter Roberson 2019-7-12
Which workspace does it need to stay in? Do any of the scripts need to execute at the command prompt, or are they all called within functions? Does the variable need to survive "clear all"?

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回答（2 个）

John Doe
John Doe 2019-7-13
clearvars -except x
Walter Roberson
Walter Roberson 2019-7-13
Create a function named X.m that when given the argument 'load' loads the value of X from a file and puts it into a persistent variable and uses mlock
https://www.mathworks.com/help/matlab/ref/mlock.html
For any other argument, including no argument, index the persistent variable and return that result.
Limitations:
  1. does not permit the user to store into the variable
  2. does not permit use of end as an index
You can possibly improve on this by defining an object with subsref and subsasgn behavior.
You cannot simply mlock a variable however.

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